A Hydrogen / Methane Breath Test is a painless and non-invasive test that can be performed to help diagnose malabsorption of certain foodstuffs (such as lactose or fructose) and bacterial overgrowth - these conditions may may cause symptoms of bloating, abdominal pain and/or diarrhoea.For your convenience, home breath testing kits are now available for purchase through Dr Halliday's rooms.